gen. nov., sp. nov., a novel sulphate-reducing bacterium in the capable of autotrophic growth with hydrogen or elemental iron.

A mesophilic sulphate-reducing micro-organism, able to grow chemolithoautotrophically with H/CO (20 : 80) and with elemental iron as a sole electron donor, was isolated from a consortium capable of degrading long-chain paraffins and designated strain DRH4. Cells were oval shaped often with bright refractile cores and occurred singly or in pairs. The cells formed pili.

Composition and Corrosivity of Extracellular Polymeric Substances from the Hydrocarbon-Degrading Sulfate-Reducing Bacterium ALDC.

Sulfate-reducing bacteria (SRB) often exist as cell aggregates and in biofilms surrounded by a matrix of extracellular polymeric substances (EPSs). The chemical composition of EPSs may facilitate hydrophobic substrate biodegradation and promote microbial influenced corrosion (MIC). Although EPSs from non-hydrocarbon-degrading SRB have been studied; the chemical composition of EPSs from hydrocarbon-degrading SRBs has not been reported.

The Complete Genome Sequence of -Alkane-Degrading Desulfoglaeba alkanexedens ALDC Reveals Multiple Alkylsuccinate Synthase Gene Clusters.

Anaerobic alkane metabolism is critical in multiple environmental and industrial sectors, including environmental remediation, energy production, refined fuel stability, and biocorrosion. Here, we report the complete gap-closed genome sequence for a model -alkane-degrading anaerobe, ALDC.

Community succession in an anaerobic long-chain paraffin-degrading consortium and impact on chemical and electrical microbially influenced iron corrosion.

Community compositional changes and the corrosion of carbon steel in the presence of different electron donor and acceptor combinations were examined with a methanogenic consortium enriched for its ability to mineralize paraffins. Despite cultivation in the absence of sulfate, metagenomic analysis revealed the persistence of several sulfate-reducing bacterial taxa. Upon sulfate amendment, the consortium was able to couple C28H58 biodegradation with sulfate reduction.

Design features of offshore oil production platforms influence their susceptibility to biocorrosion.

Offshore oil-producing platforms are designed for efficient and cost-effective separation of oil from water. However, design features and operating practices may create conditions that promote the proliferation and spread of biocorrosive microorganisms. The microbial communities and their potential for metal corrosion were characterized for three oil production platforms that varied in their oil-water separation processes, fluid recycling practices, and history of microbially influenced corrosion (MIC).